The table shows the airmail rates for sending letters and postcards to some countries.
Destination |
Letters |
Postcards |
|
Mass |
Postage Rate |
Per piece |
Indonesia, Malaysia
|
1st 20 g |
$1.20 |
$0.40
|
Every additional 10 g or part thereof |
$0.45 |
How much did Xylia pay for the postage when she sent a letter which weighed 64 g and 3 postcards to Indonesia by airmail?
Remaining mass that Xylia had to pay for the letter as it was more than 20 g
= 64 - 20
= 44 g
Number of sets of additional 10 g of the letter that Xylia had to pay for
= 44 ÷ 10
= 4 r 4
Total number of sets of additional 10 g of the letter that Xylia had to pay for
= 4 + 1
= 5
Amount that Xylia had to pay for the sets of additional 10 g of the letter
= 5 x 0.45
= $2.25
Total amount that Xylia had to pay for the letter
= 1.20 + 2.25
= $3.45
Amount that Xylia had to pay for the 3 postcards
= 3 x 0.40
= $1.20
Total amount that Xylia paid
= 3.45 + 1.20
= $4.65
Answer(s): $4.65